Which of the following is NOT true of a seahorse?
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Two muscles attach to the keel of the sternum in birds. Whi…
Two muscles attach to the keel of the sternum in birds. Which one is required for birds to take off and fly?
The monophyletic group of amniotes includes:
The monophyletic group of amniotes includes:
What is the name of the exterior opening to the tracheal sys…
What is the name of the exterior opening to the tracheal system in insects?
Which type of metamorphosis in insects includes a pupation p…
Which type of metamorphosis in insects includes a pupation phase?
What is the primary function of hair in mammals?
What is the primary function of hair in mammals?
What structure is a moveable flap covering the gills of bony…
What structure is a moveable flap covering the gills of bony fishes?
Which organ system is unique to Echinoderms?
Which organ system is unique to Echinoderms?
Which is NOT a type of glands found in the skin of mammals?
Which is NOT a type of glands found in the skin of mammals?
Match the structure on the left with the function on the rig…
Match the structure on the left with the function on the right for an amniotic egg: